| 摘要 |
<p>A mechanism for selectively securing a cover to a flange of a pressure vessel. A plurality of such devices can be employed, using a plurality of studs that extend through matching openings in the flange and cover. A movable anchor plate or plates, also with holes through which each stud extends, is disposed adjacent to the flange or cover. The head of each stud will fit through its associated hole of the anchor plate (and into the opening of the closer one of the flange or cover) only if the anchor plate is properly oriented. When the anchor plate is so oriented, a piston head at the opposite end of the stud can be actuated away from the flange and cover to retract the stud head into the opening of the flange or cover. This protects the stud when the cover is disengaged from the flange. The stud can be biased in the opposite direction to permit the anchor plate to be reoriented into a position in which the stud head cannot pass through the anchor plate, so the stud can clamp the flange and cover together.</p> |
